It's not my imagination is it? In Toronto there are more about this year. I think there are wasp patrols who signal to the others as soon as a BBQ is lit.
I know if you leave them along they won't 'bite', but it still puts offends watching them do that little aerial ballet dance before alighting on the edge of my beer glass or summer pudding. The beer is a particular nuisance as I cannot risk a swipe and watch my Fin du Monde come to the end of its life.
Is there any such thing as a wasp repellent?